“The only way for defending the sovereignty of our nation and its right to existence under the present extreme situation is to bolster up nuclear force both in quality and quantity,” the North’s official Korean Central News Agency said, paraphrasing Kim. It said Kim stressed “the need to get the nuclear warheads deployed for national defense always on standby so as to be fired any moment.”

North Korea has threatened nuclear war in the past, but it is unclear just how advanced the country’s nuclear program really is. It is thought to have a handful of crude atomic bombs, but there is considerable outside debate about the state of its arsenal.